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Colbie Caillat

Just call her Colbie Buffay.

Colbie Caillat is helping to celebrate the 20th anniversary of "Friends."  The singer-songwriter performed at the recently opened pop-up "Central Perk" coffee shop in New York on Friday.  She sang a short version of the "Smelly Cat," a well-remembered song written by Lisa Kudrow's character Phoebe Buffay. 

Fans sang along as Colbie performed on the replica stage decorated with memorabilia and actual props. Other stars are expected to show up at "Central Perk" before it shuts down on October 18th.